Properties on Yttrium-Doped/Undoped Barium Cerate and Barium Zirconate Thin Films Formed by E-Beam Vapor Deposition

As electrolyte materials for proton conductive fuel cells, perovskite-type materials such as barium cerates and barium zirconates have received a lot of attention due to their high protonic conduction at intermediate temperatures. Yet, the crystalline structure and the microstructure of the electrol...

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Bibliographic Details
Published in:Applied sciences 2022-07, Vol.12 (13), p.6422
Main Authors: Campos Covarrubias, Monica Susana, Sriubas, Mantas, Bockute, Kristina, Poskaite, Aurelija, Vazgys, Rokas, Gazda, Maria, Laukaitis, Giedrius
Format: Article
Language:English
Subjects:
Barium
barium cerate
barium zirconate
Barium zirconates
Carbonates
Chemical composition
Chemical elements
Crystal structure
Crystallinity
Crystallites
Crystallography
Crystals
Density
e-beam evaporation
Electrolytes
Electrolytic cells
Electron beams
Fuel technology
Grain size
Lattice parameters
Microstructure
morphology
Perovskites
Physical properties
Scanning electron microscopy
Thin films
Vapor deposition
Vapors
Yttrium
Zirconates
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Summary:As electrolyte materials for proton conductive fuel cells, perovskite-type materials such as barium cerates and barium zirconates have received a lot of attention due to their high protonic conduction at intermediate temperatures. Yet, the crystalline structure and the microstructure of the electrolyte layers are of the utmost importance that define the resulting protonic conductivity. The aim of this research was to investigate the formation of doped/undoped BCO and BZO thin films using e-beam vapor deposition and to analyze the influence of the formation parameters on the microstructural and crystallographic properties. Crystalline structure and microstructure were investigated by X-ray diffractometer and scanning electron microscope, while the elemental composition of the resulting thin films was analyzed by an energy-dispersive X-ray spectroscope. It was found that the formed thin films were highly dense and consisted of the oriented columnar grains. The crystallinity of the thin films was strongly expressed with the predominant crystallographic orientations for undoped/doped barium cerates. Yttrium dopant had an influence on the lattice parameters and crystallite sizes. With the chosen technological parameters allowed to both, barium cerates and barium zirconates did not form carbonates and did not experience the degradation process.
ISSN:2076-3417
2076-3417
DOI:10.3390/app12136422